<template>
  <div class="box-demo">
    <h2>组件A</h2>
    hello czh....
    <ke-tangD/>
  </div>
</template>

<script>
export default {

}
</script>

<style scoped>
.box-demo{
    border: 1px solid #0f0;
    background: #0f08;
}
</style>